Rotary pump.



N9. 773,316. PATENTED OCT. 25, 1904. E. W. EVANS.

ROTARY PUMP. APPLIOATION FILED FEED, 1:904.

K0 MODEL.

UNITED STATES Patented October 25, 1904.

PATENT @EETQE.

EDVIN IV. EVANS, OF PHILADELPHIA, PENNSYLVANIA. ASSIGNOR OF ONE-HALF TOSPENCER K. LEWIS, OF PHILADELPHIA, PENN-' SYLVANIA.

ROTARY PUMP.

SPECIFICATION forming part of Letters Patent No. 773,316, dated October25, 1904. Application filed February 9, 1904. Serial No. 192,754. (Nomodel.)

To all whom, it 777,04 (lo/worn:

Be it known thatI, EDWIN l/V. EVANS, a citi- Zen of the United States,residing in Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented a new and useful Improvement in RotaryPumps, of which the followingis a specification.

My invention relates to rotary pumps. It comprises a novel pump by whichwater or other liquid may be raised or air or other gas compressed.

It further consists of novel features of construction, all as will behereinafter fully set forth.

Figure 1 represents, chiefly in longitudinal section, a pump embodyingmy invention. Fig. 2 is afragmentary section of the device, showing adifferent arrangement. Fig. 3 is an elevation of one of thelifting-sections of the pump detached. Fig. trepresents, chiefly invertical section, a modification of the portion of the device shown inFig. 2.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings, 1 designates a casing which may be ofcylindric or rectangular section and which is divided by a par- -tition2 into chambers 3 and 4. A shaft 5 passes horizontally through thechamber 3 and has hearings in stuffing-boxes 6 and 7 at the endsthereof. On the shaft 5 is mounted a plurality of pump-sections 8, 9,and 10, the peripheries of which are hollow, forming a connected spiralconduit. As shown, thesection 8 has an open mouth 11. The section 10 hasa lateral discharge-opening 12, the function of which will hereinafterappear. The intermediate sections 9 are bent at their ends 13, andpreferably provided therein with check-valves M, as shown. The end ofthe shaft 5, which passes through the stuffingbox 6, is made tubular, asshown, and is connected by a sleeve 16 within the portion 4: of thecasing 1 with the discharge-pipe 17, which extends out of the casing.The tubular por-. tion 15 of the shaft 5 is connected at its inner endby means of a radial portion 18 with the outlet 12 of the section 10, acheck-valve 19 being interposed at or near the connection of theseparts. The chambers 3 and A of the casing 1 are also connected by a pipe20, provided with a valve-seat 21, in which isa valve 22, connected by alever 23 with a float-ball 24. The chambers 3 and 4 of the casing l are,

also provided with suitable ports 25 26, respectively.

The operation is as follows: Fig. 1 represents my device as connectedfor the raising ofwater, which may be admitted through the opening 25.of the chamber 3 of the casing 1 or through a bottom opening. (Notshown.) Assuming that the lower portion of the chamber 3 is half-full ofwater, it is evident that each rotation of the shaft 5' in the directionof the arrow (shown adjacent the pulley 27) will cause the mouth 11 ofthe hollow section 8 to dip up a portion of the water. Each subsequentrotation will cause the water so dipped up to pass one of thecheck-valves 14 in one of the sections 9 successively from right to leftof the drawings. When this first volume of water passes through thesection 10. it is discharged through the check-valve 19 and passage 18into the tubular portion of the shaft 5, thence through thedischarge-pipe 17, in which it may be raised to a height correspondingto the number of convolutions in the conduit system 8, 9, and 10. It isevident that a fairly rapid rotation of the shaft 5 will result in anintermittent stream of water and air being forced out through the pipe17.

When it is desired to use the pump for compressing air, the pipe 17 isremoved, and the aperture through whichit enters the pump 4: filled by aplug 28, as shown in Fig. 2. The water-inlet is cut off from the opening25, which is opened to the atmosphere, and the chamber 3 filled lessthan one-half full of water.

It is evident that the rotation of the .sections will in this casedischarge water and air under pressure out of the open mouth of thetubular portion 15. A suitable pipe being connected to the outlet 26 theair is led away to a storage-tank or place where it is to be used. Whenthe water discharged from the tube 15 rises to a sufficient height inthe chamber 4., it will raise the float 2a and valve 252, so that thewater will pass back through the pipe 20 into the chamber 3. In this itwill be assisted by the pressure of air in the upper part of the chamberat. If desired, a check-valve 29 (shown in Fig. 4 of the drawings) maybe placed at the open end of the tubular portion 15 of the the shaft 5.

It is evident that various changes may be made by those skilled in theart which will come within the scope of my invention. Thus, except foreconomy of construction, it might be advantageous to make the sections8, 9, and 10 in a continuous spiral instead of in the form shown, and Ido not, therefore, desire to be limited in every instance to the exactconstruction herein shown and described.

Having thus described my invention, what 1 claim as new, and desire tosecure by Letters Patent, is

1. A rotary pump comprising a plurality of convoluted conduit-sections,a mouth on one of said sections, check-valves between said sections, anaxial discharge and means connecting the convoluted portion farthestfrom said mouth with said axial discharge.

2. A pump comprising a rotary shaft, a plurality of convoluted conduitsections mounted on said shaft and connected together, check-valvesintermediate said sections, one of said sections having a mouth and theone farthest therefrom an axial discharge and a casing in which saidconvoluted sections are mounted.

A rotary pump adapted alternatively to the lifting of liquid and thecompression of an aeriform fluid comprising a plurality of convolutedsections, a mouth on one of said sections, check-valves between saidsections, a tube providing an axial discharge-orifice for said sections,a chamber in which said tube enters, and means on said chamber fordetachably connecting a discharge-pipe with said tube.

4. A rotary pump adapted alternatively to the lifting of liquid and thecompression of aeriform fluid comprising a hollow convolution having amouth, an axial discharge-orilice, a valve intermediate said mouth andsaid orifice, a chamber in which the tube comprising saiddischarge-orifice enters, means for detachably connecting adischarge'pipe with said tube within said chamber and separate means forthe emission of liquid and aeriform fluid from said chamber.

5. A rotary pump adapted alternatively to the lifting of liquid and thecompression of aeriform fluid comprising a rotary hollow convolutionhaving a mouth, an axial dischargeorifice, a valve intermediate saidmouth and said orifice, a chamber in which the tube comprising saiddischarge-orifice enters, means for detachably connecting adischarge-pipe with said tube within said chamber, means for theemission of aeriform fluid from said chamber, a discharge-orifice forliquid from such chamher and an automatic valve controlling saidlast-named orifice.

6. A rotary pump comprising a casing provided with a plurality ofchambers, a rotary shaft passing through one of said chambers and havinga tubular end portion opening into the other of said chambers, aplurality of hollow convoluted sections in said. firstnamed chamber, oneof said convolutions having an open mouth and another of saidconvolutions having a tube connecting it with the tubular portion ofsaid shaft, check-valves intermediate said mouth and saidconnectingtube, means in said casing for detachably conneoting adischarge-pipe with said tubular shaft portion and separate aperturesfor the emission of aeriform fluid and of a liquid from said secondchamber.

EDWIN l V. EVANS.

\Vitn ess es:

JOHN A. W I'EDERSHEIM, (ino. L. Goornn.

